Hello, unfortunately my uncle got into an accident and his 540i is totaled. He offered me his BMW style 19 wheels with summer tires, but I'm not sure if they would fit on my Z3. I think the bolt pattern is the same, but I'm pretty sure the offset would be different. If someone could tell me for sure, that would be great. Also, anyone know the weight? Thanks.

I'm curious about this too

If his 540 is an E39, not only would the offset be different, the hub measurement is also different. The hub of an E39 is 74.1mm, larger than the standard 72.56mm. This would cause vibrations and you would need hubcentric rings. And even if you have hubcentric rings, the offset is wrong.